EP1970197B1 - Printing group of a rotary printing press - Google Patents

Abstract

The cylinder (2,3) has at least two ducts (12,13,14) one behind each other in a peripheral direction and taking second casings (9,11) on the cylinder. At least one of the ducts is at least partly covered by a second casing. The cylinder is a form or transfer cylinder with the second casing in the form of a printing plate,.

Description

The invention relates to a printing unit of a rotary printing press according to the preamble of claim 1.

From the DE 44 29 210 A1 the arrangement of four in the direction of rotation of a forme cylinder successively arranged printing foils is known, which are held in four pits. The printing foils each span a circular arc section lying between two pits.

The DE 44 29 891 A1 shows a printing unit of a rotary printing machine with double-sized transfer cylinder (ie, two section lengths around the circumference), which cooperates with a simple large form cylinder.

Also is through the DE 198 03 809 A1 an arrangement of cylinders of an offset printing unit is known in which the circumference of the transfer cylinder to that of the forme cylinder is in a double ratio. The forme cylinder can be assigned in the circumferential direction with a printing form and in its longitudinal direction with at least four stationary printed pages in broadsheet format, or a corresponding number of standing or lying tabloid or book formats. In the circumferential direction of the transfer cylinder for receiving two in the longitudinal direction of the cylinder juxtaposed blankets a single, either longitudinally continuous or longitudinally divided and offset by 180 °, slot arranged. The blanket is, for example, two-ply designed as a fixed to a support plate rubber blanket.

In the DE 34 41 175 C2 be for the purpose of relaxing the blanket Recesses proposed in the cylinder surface of the transfer cylinder. Between cylinder and blanket can also be arranged for this purpose a pad that does not have the entire length of the blanket in the circumferential direction and has an interruption. To accommodate the interrupted pad a slot is provided on the circumference of the cylinder next to the clamping channel for the blanket. The arranged in the longitudinal direction of the transfer cylinder recesses and the rubber blanket receiving channel are arranged so that they act together in the contact region with the channel of the plate cylinder.

The DE 197 40 475 A1 shows cooperating forming and transfer cylinder, wherein in one embodiment, the transfer cylinder in the circumferential direction one behind the other two clamping channels and two held in the clamping channels rubber blankets. In another example, a double-sized transfer cylinder interacts with a double-sized forme cylinder, but both cylinders have only one chucking channel in the circumferential direction. In all examples, the channels do not roll off each other.

By the DE-OS 19 60 635 a single form cylinder is disclosed, which has on its circumference in the circumferential direction a plurality of channels for the attachment of printing plates. When occupying the forme cylinder with a printing forme in the circumferential direction, at least one of the channels can be covered.

In the GB 2092069 A It is about the problem of being able to assign possibly occurring printing errors to a specific printing unit for its correction in a product composed of several printing machine lines. This is achieved by means of a kind of indexed stamp, which is arranged in the channel of the forme cylinder and whose printed image is printed on the transfer line via the transfer cylinder.

The GB-A-1476707 In the introduction, a concept for double-width printing units with continuous chip channels is already criticized, and therefore a concept with paired plates or channel sections is proposed for the triple-width machine are held here in three channel sections.

Also the DE 24 22 696 C2 discloses a triple-width printing machine, wherein the plate sets are offset on the forme cylinder and on the frame clamping elements are provided for the introduction of counter moments in the cylinder.

The item " 6-plate wide newspaper machines - history and facts "from newspaper technology 1991 (XP002376303 ) also deals with triple-width newspaper printing works. In illustration 1 Even for the quadruple-sized triple-width cylinder can be seen that the channel sections are offset, and not continuous.

The US 5,687,648 A While disclosing a blanket having a backing plate and a layer, it does not make any reference to extra long cylinders in newspaper printing.

The invention has for its object to provide a printing unit of a rotary printing press.

The object is achieved by the features of claim 1.

It is particularly advantageous that both different formats of the elevators, in the circumferential and longitudinal direction of the cylinder, as well as different constellations and phase shifts of mutually interacting cylinders considered, and thereby in terms of partly competing requirements of Registerability, low vibration, arrangement of the rolling pressure areas and minimizing the non-printable paper as needed can be optimized.

The arrangement of a single longitudinally and circumferentially extending elevator brings advantages in terms of variety in the printable formats (height and width of the print area such as Panorama).

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

ein nicht beanspruchtes doppelt breites Zylinderpaar, wobei der Formzylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet ist und sich die Aufzüge auf dem Formzylinder nahezu über den vollen Umfang erstrecken;

Fig. 2

ein nicht beanspruchtes doppelt breites Zylinderpaar, wobei der Form- und Übertragungszylinder mit jeweils zwei in Längsrichtung verlaufenden Kanälen ausgebildet ist und sich die Aufzüge auf dem Form- und Übertragungszylinder nahezu über den vollen Umfang erstrecken;

Fig. 3

zwei nicht beanspruchte doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit zwei in Längsrichtung verlaufenden Kanälen ausgebildet und mit zwei sich nahezu über die gesamte Länge des Ballens erstreckenden, in Umfangsrichtung hintereinander angeordneten Aufzügen belegt ist;

Fig. 4

zwei nicht beanspruchte doppelt breite Zylinderpaare, wobei der Übertragungszylinder mit jeweils vier in Längsrichtung verlaufenden Kanälen ausgebildet ist und mit zwei sich nahezu über die gesamte Länge des Ballens erstreckenden, in Umfangsrichtung hintereinander angeordneten Aufzügen belegt ist;

Fig. 5

ein mehrschichtiges Drucktuch mit Kanal und Halteeinrichtung.

Show it:

Fig. 1

an unclaimed double-wide pair of cylinders, wherein the form cylinder is formed with two longitudinally extending channels and the elevators extend on the forme cylinder almost over the full circumference;

Fig. 2

an unclaimed double-wide pair of cylinders, wherein the forming and transfer cylinder is formed with two longitudinally extending channels and the elevators extend on the forming and transfer cylinder almost over the full circumference;

Fig. 3

two unstressed double-wide pairs of cylinders, wherein the transfer cylinder is formed with two longitudinally extending channels and is occupied with two extending over almost the entire length of the bale, circumferentially arranged successively elevators;

Fig. 4

two unstressed double-wide pairs of cylinders, wherein the transfer cylinder is formed with four longitudinally extending channels and is occupied with two extending over almost the entire length of the bale, circumferentially successively arranged elevators;

Fig. 5

a multi-layered blanket with channel and holding device.

A printing unit of a rotary printing machine has at least one pair of cylinders 01 consisting of two cylinders 02; 03, for example, a transfer cylinder 02 and cooperating with this form cylinder 03. The transfer cylinder 02 can act on the printing substrate 04 to be printed with a counter-pressure cylinder, not shown, or with a transfer cylinder 07 of a second cylinder pair 06, which in turn is associated with a forme cylinder 08. The transfer cylinder 02; 07 are each with at least one elevator 09, for example a blanket 09, and the forme cylinder 03; 08 each with at least one elevator 11, for example, a printing plate 11, assignable.

Depending on the requirements of the print formats and the printing performance, as well as the possibilities in the paper guide, the cylinder pairs 01; 06 different widths executed. For example, the cylinder pairs 01; 06 for the newspaper printing three times wide (six newspaper pages in the longitudinal direction of the cylinder) carried out, simply wide the width of the bale, for example, the forme cylinder 03, for two standing or lying newspaper pages referred. In commercial printing, double-width refers to the required width for four horizontal or six vertical A4 pages. The sizes of transmission 02; 07 and the forme cylinder 03; 08 are each made simple or double, based on a variety of standing or lying formats, such as a standing or lying newspaper format. Advantageous constellations in newspaper printing are for example a doubly large scale, ie two sides in the circumferential direction, the transfer cylinder 02; 07 acting together with a double or simple circumference of the forme cylinder 03; 08, each double width.

Fig. 1 shows an unclaimed double-wide pair of cylinders 01, wherein transfer cylinder 02 and forme cylinder 03 each have a double circumference. The forme cylinder 03 has two longitudinally extending and circumferentially spaced channels 12; 13 for receiving the ends of at least one printing plate 11, the transfer cylinder 02 a channel 14 for receiving the ends of at least one blanket 09 on. The channels 12; 13 of the forme cylinder 03, 08 are at least on a partial section in the longitudinal direction of the forme cylinder 03; 08, viewed in a direction perpendicular to the axis of rotation cross section, arranged in the circumferential direction one behind the other. The forme cylinder 03 is in the unclaimed example with four in the longitudinal direction of the cylinder juxtaposed printing plates 11, for example, pressure plates 11 occupied, which are each held with its two ends in the channel 12, extend to the region of the channel 12 respectively around the entire circumference and each cover the channel 13. The forme cylinder 03 is made three times wide in the claimed printing unit. He can be flexible in many ways, eg. B. with a continuous, or two or more longitudinally juxtaposed printing plates 11 different formats (eg., Simple, Panorama) be occupied. If necessary, the forme cylinder 03 may also have more than two longitudinally extending and circumferentially spaced channels 12; 13 have. The transfer cylinder 02 in Fig. 1 has a continuous channel 14.

The transfer cylinder 02 can also, as exemplified in Fig. 2 shown a second, z. B. diametrically opposite and extending in the longitudinal direction of the transfer cylinder 02 channel 16. In the example covers a single, up to the region of the channel 14 over the entire length of the bale and almost over the entire circumference extending blanket 09 the transfer cylinder 02. Der Form cylinder is here in unclaimed Ausfürhung with two in the longitudinal direction of the cylinder adjacent, and each occupied by almost the full circumference extending printing plates 11.

Unlike in FIGS. 1 and 2 with the forme cylinder 03; 08 cooperatively shown, not claimed double-width embodiment of the transfer cylinder 02 this invention is made three times wide. The with the two channels 12, 13 having the form of cylinders 03; 08 cooperating transfer cylinder 02; 07 from the first two embodiments ( Fig. 1, 2 ) is, as in the FIGS. 1 to 4 and whose description is shown by way of example, occupied by a continuous blanket 09. In the Figures 3 and 4 can in this case z. As well as a forme cylinder 03 double circumference of the Figures 1 or 2 and their description in place of in the FIGS. 3 to 4 illustrated form cylinder 03; 08 kick. If necessary, the transfer cylinder 03 may also have more than two longitudinally extending and circumferentially spaced channels 12; 13 have. With the according to Fig. 1 and 2 also shown embodiments for the forme cylinder 03, 08, a transfer cylinder conventional design and occupancy (eg, doubly large and only one channel, a blanket in the longitudinal direction) act together.

In the following embodiments, Figures 3 and 4 and related description, are some other advantageous embodiments for the arrangement of blankets 09 on a transfer cylinder 02; 07 set forth, wherein the transfer cylinder 02; 07 a plurality of longitudinally extending channels 14; 16 has. The examples each show two printing unit forming, unclaimed double-width cylinder pairs 01; 06, wherein the two transfer cylinders 02; 07 on the substrate 04 together. The cylinder pairs 01; 06 are according to the invention, however, three times wide. The teaching from the examples is to be applied accordingly. In the examples, the transfer cylinder 02; 07 one twice large extent on as the forme cylinder 03; 08, which is here occupied with four longitudinally juxtaposed printing plates 11. Likewise, the forme cylinder 03; 08 but also with two juxtaposed panoramic printing plates, or a panorama printing form and two simple printing forms be occupied. For all subsequent embodiments, the cooperating form cylinder 03; 08 but also be made double in size, he has two channels 12; 13, and may be occupied with two in the axial direction next to each other or in the circumferential direction successively arranged printing plates 11, or with several longitudinally side by side and simultaneously with a plurality of circumferentially successively arranged printing plates. Also in the Figures 1 and 2 illustrated embodiments for the with the transfer cylinders 02; 07 of the Figures 3 and 4 co-operating form cylinder 03; 08 are to be applied.

In Fig. 3 is the unclaimed arrangement of two blankets 09 on a respect to a newspaper page double wide transfer cylinder 02; 07 shown with double large handling, which are arranged in the circumferential direction one behind the other and each extending almost over the entire length of the bale. Each blanket 09 four in the longitudinal direction of the transfer cylinder 02; 07 juxtaposed newspaper pages transferred. Are more than two channels 14, 16 on the transfer cylinder 02; 07 arranged, so is the arrangement of a corresponding number of blankets 09, or a coverage of channels 14; 16 possible.

Fig. 4 shows an assignment of the transfer cylinder 02; 07, for example, for four channels 14; 16; 17; 18 with two circumferentially successively arranged elevators 09; 11, in which case each second channel 17; 18 is covered. The same applies to the arrangement of four channels on form cylinders 03; 08th

For the form cylinder 03; 08 is in each case the circumferentially symmetrical arrangement of the channels 12; 13 and 14, respectively; 16 with almost identical intermediate angles advantageous, z. B. at two channels 12; 13 and 14, respectively; 16 by 180 °

The ratio of the circumference of the transfer cylinder 02; 07 to the forme cylinder 03; 08 is advantageous integer, in particular for the case of a forme cylinder 03; 08 with circumferentially arranged in succession channels 12; 13 at twice the size equals 1.

In the Fig. 3 and 4 shown two cylinder pairs 01 and 06 need not be equipped in the same way with the same channel number and geometry, or with the same pattern for the elevators 09; 11 be occupied. However, it is advantageous to tune the phases of non-printing areas of the co-operating transfer cylinder 02; 07 so that non-printing areas, in particular areas of hidden or not covered channels cooperate.

The form cylinder can also in the "usual" way, d. H. with a number of elevators 09 given by the number of channels; 11 be occupied in the circumferential direction one behind the other.

In the FIGS. 1 to 4 are the channels 12; 13, 14, 16; 17; 18, although in each case to the front side of the cylinder 02; 04, 07; 08 shown running. However, for reasons of stability, for reasons of pollution or when using bearer rings, however, an edge without a channel 12 can be provided on the front side; 13; 14; 16; 17; 18 present. The channels 12; 13; 14; 16; 17; 18 extend in this case almost over the entire length of the cylinder 02; 03, 07; 08 or its bale.

The said embodiments and examples of the arrangement of channels 12; 13; 14; 16; 17; 18 and elevators 09; 11 on transfer cylinders 02; 07 and form cylinders 03; 08 as well as configurations of printing units with a pair of cylinders 01; 06 from a transfer cylinder 02; 07 and a co-operating form cylinder 03; 08 are of course also apply to the case when the cylinder pair 01; 06 does not cooperate with a second transfer cylinder 07, but with an example, designed as a steel cylinder impression cylinder together.

Under elevator 11 is here z. B. understood a one-piece pressure plate 11. The elevator 09 for the transfer cylinder 02; 07 represents a one-piece printing blanket 09. This one-piece printing blanket 09 has a multi-layered construction, wherein for the latter on a carrier plate 21, for example, at least one layer 22 is applied and fixedly connected thereto. The ends 23; 24 of the multilayer blanket 09 act with a channel 14; 16; 17; 18 arranged holding device 26 together.

In particular in connection with narrow openings of the channels 14; 16; 17; 18 to the lateral surface of the transfer cylinder 02; 07 toward the formation of the blanket 09 is advantageous as a multi-layer blanket 09, which does not or only insignificantly changes when rolling example, the forme cylinder 03 on the transfer cylinder 02 by walking its length or width, that is almost dimensionally stable. For this purpose, the blanket unit 09, as in Fig. 5 shown, the almost dimensionally stable support plate 21, for example of metal or plastic, on which the elastic or soft layer 22 is applied (indicated in FIG Fig. 1 and 2 ). In the present example of the multi-layer printing blanket 09, the ends 23 and 24 of the blanket 09 are identical to the ends of the support plate 21, since the support plate 21 in with the channel 14; 16; 17; 18 cooperating area is bent and uncoated.

The support plate 21 of the multi-layer printing blanket 09 may be coated in another embodiment also up to the ends of the support plate 21, in which case the ends 23 and 24 of the multilayer blanket 09 in addition to the support plate 21 also have the layer 21. If the blanket is designed as a simple rubber blanket 09, the ends 23 act; 24 of the blanket 09 with the channels 14; 16; 17; 18 together.

Also the channels 12; 13 may have holding devices 33 for the printing plates 11 in an advantageous embodiment.

The holding device 26; 33 may be a known device for non-positive or positive holding and / or clamping a lift 09; Be 11, such. As non-positive or positive mechanisms, spring force or gear driven terminal strips or shafts, or tangential driver.

An advantageous embodiment of a holding device 26; 33 for a lift 09; 11, in particular for a multi-layer printing blanket 09 or a printing plate 11, is the example of a multi-layer printing blanket 09 in Fig. 5 shown representative of the channel 14 in the transfer cylinder 02. The arrangement of such or similar holding means 33 for the printing plates 11 in the channels 12; 13 is an example in Fig. 2 indicated.

The holding device 26 is arranged in the axially extending channel 14 of the transfer cylinder 02 for holding the blanket 09. The operation of the device for clamping or holding the multi-part blanket 09 via a rotatably mounted in the channel 14 of the transfer cylinder 02 shaft 27, for example, a spindle 27 with pressure pieces 28th

The parallel to the axis of the transfer cylinder 02 extending to the tangent of the lateral surface by 30 to 60 °, in particular by about 45 °, inclined channel 14 has a gap 29 on the lateral surface of the transfer cylinder 02 and a lying inside the transfer cylinder 02, with the Gap 29 connected, bore 31. The width b29 of the gap 29 in the region of the circumferential surface in the circumferential direction of the

Transfer cylinder (02, 03, 07, 08) is greater than twice the thickness of one of the ends 23; 24 of the blanket 09, which in the present example is equivalent to twice the thickness of the support plate 21. For the width b29 of the gap 29 is advantageously 1 mm ≤ b29 ≤ 5 mm, in particular b29 ≤ 3 mm. In the case of a simple blanket 09, the width b29 is insubstantially greater than twice the thickness of the blanket 09, in the case of the multi-layer blanket 09 coated to the ends of the carrier plate 21, the width b29 is insignificantly greater than twice the thickness of the coated end 23; 24 of the multi-layer blanket 09 to choose.

In the bore 31, the shaft 27, in the example, a pivotable spindle 27, arranged in which the pressure pieces 28, z. B. stamp, balls or similar, are arranged directed resiliently and radially outward.

For clamping the blanket 09 both ends 23; 24 of the blanket 09, in the example equivalent to the ends of the support plate 21, guided in the gap 29 and the spindle 27 with the pressure pieces 28 so pivoted that this almost perpendicular to the leading and trailing end 23 and 24 of the blanket 09 and the support plate 21 and a cylinder-fixed wall 32 presses and holds this non-positively in the gap 29. If a plurality of printing blankets 09 are arranged one behind the other in the circumferential direction of the transfer cylinder 02, a forward and a trailing end 23 and 24 of adjacent printing blankets 09 act together in each case. The holding device 26 may additionally comprise a slide, not shown, which in addition to the ends 23 and 24 in the gap 29 can be inserted and the gap 29 terminates to the outside. Advantageously, this slide is connected to the spindle 27, so that it is moved in pivoting of the spindle 27 in or out of the gap 29. The width b29 of the gap 29 is formed correspondingly larger when using such a slider.

The channels 12; 13 of the forme cylinder 03; 08 are in a preferred embodiment as for the channel 14; 16; 17; 18 also as to the tangent of the lateral surface by 30 to 60 °, in particular by about 45 °, inclined narrow slots 12; 13, which has a width b12 (FIG. Fig. 1, 2 ) in the region of the lateral surface in the circumferential direction, which is greater than twice the thickness of the printing plate 11. For the width b12 of the slot 12, advantageously 1 mm ≦ b12 ≦ 5 mm, in particular b12 ≦ 3 mm. For an exemplary schematic representation of the holding device 33 for the printing plate 11 is shown in the multi-part blanket 09 Fig. 5 only the multi-part blanket 09 (from support plate 21 and layer 22) by a printing plate 11 with bent, in the channel 12; To replace 13 reaching ends. The reference number for the width b29 would correspond to the width b12 and the reference numeral for the transfer cylinder 02 of the forme cylinder, z. B. 03. The ends 23; 24 correspond to the bent ends of the printing forme 11.

On a holding device 33 in the channels 12; 13 of the forme cylinder 03; 08 can be omitted if by means of shaping the ends of the printing plate 11 and / or the channels 12; 13 a secure holding is guaranteed.

LIST OF REFERENCE NUMBERS

01

Cylinder pair, first

02

Cylinder, transfer cylinder (01)

03

Cylinder, forme cylinder (01)

04

substrate

05

-

06

Cylinder pair, second

07

Cylinder, transfer cylinder (06)

08

Cylinder, forme cylinder (06)

09

Elevator, blanket, blanket

10

-

11

Elevator, printing form, printing plate

12

Channel; Slot (03; 08)

13

Channel; Slot (03; 08)

14

Channel (02; 07)

15

-

16

Channel (02; 07)

17

Channel (02; 07)

18

Channel (02; 07)

19

-

20

-

21

Carrier plate (09)

22

Layer (09)

23

End (09)

24

End (09)

25

-

26

holder

27

Shaft, spindle

28

Pressure piece

29

gap

30

-

31

Bore (02; 03; 07; 08)

32

Wall (02; 03; 07; 08)

33

holder

b12

Width (12; 13)

b19

Width (19)

Claims (20)

1. Printing unit of a rotary printing machine, comprising a transfer cylinder (02; 07) having a channel (14; 16; 17; 18) for receiving a cover (09), a plate cylinder (03; 08), arranged in a cooperating manner with the transfer cylinder (02; 07) as a pair of cylinders (01; 06), and a cylinder cooperating with the transfer cylinder (02; 07) via a substrate to be printed (04), the bodies of the transfer cylinder (02; 07) and of the plate cylinder (03; 08) being formed with a triple width and each having a width which approximately corresponds to six horizontal or vertical newspaper pages, characterised in that the cover (09) extends over the entire length of the body of the transfer cylinder (02), the cover (09) on the transfer cylinder (02; 07) being realised as a multilayer blanket (09) including a support layer (21) and a layer (22) connected to the support layer (21), in that the plate cylinder (03; 08) cooperating with the transfer cylinder (02; 07) includes two channels (12; 13), which are offset from each other by approximately 180° in the peripheral direction, for receiving one or more media (11), and in that each of the two channels (12; 13) of the plate cylinder (03; 08) extends over almost the entire length of a body of the plate cylinder (03; 08) up to the end face or up to an endface edge.
2. The printing unit according to claim 1, wherein the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) includes, in the area of the outer surface, a gap (29) having a width (b29) in the peripheral direction of 1 mm to 5 mm.
3. The printing unit according to claim 1, wherein the channel (12; 13) of the plate cylinder (03; 08) has, in the area of the outer surface, a width (b12) in the peripheral direction of 1 mm to 5 mm.
4. The printing unit according to claim 1, wherein the cylinder cooperating with the transfer cylinder (02; 07) via the substrate to be printed (04) is realised as a counter pressure cylinder which is different from a second transfer cylinder.
5. The printing unit according to claim 1, wherein the cylinder cooperating with the transfer cylinder (02; 07) via the substrate to be printed (04) is realised as a transfer cylinder (07; 02) of a second pair of cylinders (06; 01).
6. The printing unit according to claim 1, wherein the ratio of the circumference of the transfer cylinder (02; 07) to that of the plate cylinder (03; 08) is integer.
7. The printing unit according to claim 6, wherein the plate cylinder (03; 08) and the transfer cylinder (02; 07) have the same circumference.
8. The printing unit according to claim 1, wherein the body of the transfer cylinder (02; 07) has a circumference which corresponds to at least two horizontal or vertical newspaper pages.
9. The printing unit according to claim 1, wherein the body of the plate cylinder (03; 08) has a circumference which corresponds to at least two horizontal or vertical newspaper pages.
10. The printing unit according to claim 1, wherein the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) includes, in the area of the outer surface, a gap (29) having a width (b29) in the peripheral direction which is larger than twice the thickness of one of the ends (23; 24) of the cover (09) and is less than or equal to 3 mm.
11. The printing unit according to claim 1, wherein a channel (12; 13) of the plate cylinder (03; 08) has, in the area of the outer surface, a width (b12) in the peripheral direction which is larger than twice the thickness of a medium (11) and is less than or equal to 3 mm.
12. The printing unit according to claim 1, wherein the ends of the media (11) are arranged to be aligned along the length of the plate cylinder (03; 08).
13. Printing unit according to claim 1, wherein the plate cylinder (03; 08) includes a plurality of media (11) which are arranged one behind the other in the peripheral direction.
14. The printing unit according to claim 1, wherein the transfer cylinder (02; 07) includes two channels (14; 16; 17; 18) which are arranged one behind the other in the peripheral direction.
15. The printing unit according to any one of claims 1 or 14, wherein the channels (12; 13; 14; 16; 17; 18) are uniformly spaced in the peripheral direction.
16. The printing unit according to claim 15, wherein two channels (12; 13; 14; 16; 17; 18) are offset from each other by approximately 180° in the peripheral direction.
17. The printing unit according to claim 1, wherein the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) includes at least one holding device (26), which is preferably driven by an elastic force.
18. The printing unit according to claim 1, wherein a channel (12; 13) of the plate cylinder (03; 08) includes at least one holding device (33), which is preferably driven by an elastic force.
19. The printing unit according to claim 1, wherein the channel (14; 16; 17; 18) of the transfer cylinder (02; 07) is inclined by 30 to 60°, preferably by about 45°, to the tangent of the outer surface.
20. The printing unit according to claim 1, wherein a channel (12; 13) of the plate cylinder (03; 08) is inclined by 30 to 60°, preferably by about 45°, to the tangent of the outer surface.

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